php中AES加密解密的例子小結_PHP教程

aesDemo.php：

例子，

複製代碼 代碼如下:
require_once('./AES.php');
//$aes = new AES();
$aes = new AES(true);// 把加密後的字串按十六進位進行儲存
//$aes = new AES(true,true);// 帶有調試資訊且加密字串按十六進位儲存
$key = "this is a 32 byte key";// 密鑰
$keys = $aes->makeKey($key);
$encode = "123456";// 被加密的字串
$ct = $aes->encryptString($encode, $keys);
echo "encode = ".$ct."
";
$cpt = $aes->decryptString($ct, $keys);
echo "decode = ".$cpt;
?>

例子、AES加密類

複製代碼 代碼如下:
//php aes加密類
class AESMcrypt {

public $iv = null;
public $key = null;
public $bit = 128;
private $cipher;

public function __construct($bit, $key, $iv, $mode) {
if(empty($bit) || empty($key) || empty($iv) || empty($mode))
return NULL;

$this->bit = $bit;
$this->key = $key;
$this->iv = $iv;
$this->mode = $mode;

switch($this->bit) {
case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
default: $this->cipher = MCRYPT_RIJNDAEL_128;
}

switch($this->mode) {
case 'ecb':$this->mode = MCRYPT_MODE_ECB; break;
case 'cfb':$this->mode = MCRYPT_MODE_CFB; break;
case 'ofb':$this->mode = MCRYPT_MODE_OFB; break;
case 'nofb':$this->mode = MCRYPT_MODE_NOFB; break;
default: $this->mode = MCRYPT_MODE_CBC;
}
}

public function encrypt($data) {
$data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));
return $data;
}

public function decrypt($data) {
$data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);
$data = rtrim(rtrim($data), "..");
return $data;
}

}
//使用方法
$aes = new AESMcrypt($bit = 128, $key = 'abcdef1234567890', $iv = '0987654321fedcba', $mode = 'cbc');
$c = $aes->encrypt('haowei.me');
var_dump($aes->decrypt($c));

例子、附一個可加密可解密類

複製代碼 代碼如下:
/**
* AES加密、解密類
* @author hushangming
*
* 用法：
*

 * // 執行個體化類
 * // 參數$_bit：格式，支援256、192、128，預設為128位元組的
 * // 參數$_type：加密/解密方式，支援cfb、cbc、nofb、ofb、stream、ecb，預設為ecb
 * // 參數$_key：密鑰，預設為abcdefghijuklmno
 * $tcaes = new TCAES(); 
 * $string = 'laohu';
 * // 加密
 * $encodeString = $tcaes->encode($string);
 * // 解密
 * $decodeString = $tcaes->decode($encodeString);
 * 

*/
class TCAES{
private $_bit = MCRYPT_RIJNDAEL_256;
private $_type = MCRYPT_MODE_CBC;
//private $_key = 'abcdefghijuklmno0123456789012345';
private $_key = 'abcdefghijuklmno'; // 密鑰
private $_use_base64 = true;
private $_iv_size = null;
private $_iv = null;

/**
* @param string $_key 密鑰
* @param int $_bit 預設使用128位元組
* @param string $_type 加密解密方式
* @param boolean $_use_base64 預設使用base64二次加密
*/
public function __construct($_key = '', $_bit = 128, $_type = 'ecb', $_use_base64 = true){
// 加密位元組
if(192 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_192;
}elseif(128 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_128;
}else{
$this->_bit = MCRYPT_RIJNDAEL_256;
}
// 加密方法
if('cfb' === $_type){
$this->_type = MCRYPT_MODE_CFB;
}elseif('cbc' === $_type){
$this->_type = MCRYPT_MODE_CBC;
}elseif('nofb' === $_type){
$this->_type = MCRYPT_MODE_NOFB;
}elseif('ofb' === $_type){
$this->_type = MCRYPT_MODE_OFB;
}elseif('stream' === $_type){
$this->_type = MCRYPT_MODE_STREAM;
}else{
$this->_type = MCRYPT_MODE_ECB;
}
// 密鑰
if(!empty($_key)){
$this->_key = $_key;
}
// 是否使用base64
$this->_use_base64 = $_use_base64;

$this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type);
$this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND);
}

/**
* 加密
* @param string $string 待加密字串
* @return string
*/
public function encode($string){
if(MCRYPT_MODE_ECB === $this->_type){
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
if($this->_use_base64)
$encodeString = base64_encode($encodeString);
return $encodeString;
}

/**
* 解密
* @param string $string 待解密字串
* @return string
*/
public function decode($string){
if($this->_use_base64)
$string = base64_decode($string);

$string = $this->toHexString($string);
if(MCRYPT_MODE_ECB === $this->_type){
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
return $decodeString;
}

/**
* 將$string轉換成十六進位
* @param string $string
* @return stream
*/
private function toHexString ($string){
$buf = "";
for ($i = 0; $i < strlen($string); $i++){
$val = dechex(ord($string{$i}));
if(strlen($val)< 2)
$val = "0".$val;
$buf .= $val;
}
return $buf;
}

/**
* 將十六進位流$string轉換成字串
* @param stream $string
* @return string
*/
private function fromHexString($string){
$buf = "";
for($i = 0; $i < strlen($string); $i += 2){
$val = chr(hexdec(substr($string, $i, 2)));
$buf .= $val;
}
return $buf;
}
}

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